How Can You Tell If Your Water Has Broken?

Signs your water broke include a sudden gush or a steady trickle of watery fluid from the vagina. Only a clinician can confirm it, so call your obstetric provider or labor and delivery unit right away. Once the protective sac around the baby opens, infection and umbilical cord problems become possible. This article explains how the fluid looks and feels, how it differs from urine and discharge, what to do, and which signs need 911.

What "your water breaking" actually means

Your baby grows inside a sac of membranes filled with amniotic fluid. When the membranes open, the fluid leaks out through the vagina. Clinicians call this rupture of membranes. ACOG Practice Bulletin No. 217 defines prelabor rupture of membranes as the sac opening before contractions begin. The water can also break after labor has started.

Movies show a dramatic gush. In real life it varies. Some people feel a pop and a rush of fluid. Others notice only a slow, steady trickle or a feeling of constant dampness. Because the amount differs so much, the details below matter more than the volume.

Signs your water broke: what the fluid looks and feels like

Amniotic fluid is typically clear or pale and may have little odor, but appearance alone cannot confirm rupture. Several features can help you recognize it:

• It keeps coming. Urine stops when you stop urinating. Amniotic fluid may keep leaking, especially when you stand or move, because the body keeps producing it, though the amount varies.
• You cannot control it. Leaking that you cannot stop may fit amniotic fluid, but urine can leak the same way in late pregnancy, so only an exam can tell them apart.
• It soaks through. A panty liner may be wet through again quickly, and fluid may run down your legs when you stand.
• It is thin and watery. Normal vaginal discharge is usually thicker, creamy or mucus-like.

None of these features is perfectly reliable alone, and odor cannot confirm or exclude rupture. Clinicians combine your history, an examination and sometimes testing to decide whether the membranes have ruptured.

Water, urine or discharge? Sorting out the look-alikes

Late pregnancy often brings more leaking of every kind. The growing uterus presses on your bladder, so small urine leaks with coughing, sneezing or laughing are common. Vaginal discharge usually increases too. These can be hard to tell from amniotic fluid at home.

Losing the mucus plug is not the same as your water breaking. It is a thicker plug of mucus from the cervix, and it may be followed by labor soon, later, or not for some time. If you are unsure which one you have, call your provider and describe what you see.

Why a home pad check is not a shortcut

Some people try to sort this out at home by lying down with a pad and then standing up. Home pad checks cannot reliably separate fluid from urine or discharge, and an exam and testing are how rupture is confirmed (ACOG Practice Bulletin No. 217). Call your care team first and describe what you notice instead of waiting to test it at home.

What to do if you think your water broke

Call your obstetrician, midwife or the labor and delivery unit, even in the middle of the night. Labor and delivery teams generally welcome these calls. Be ready to tell them:

• When the fluid started and roughly how much there was.
• The color and smell of the fluid.
• Whether you are having contractions, and how far apart they are.
• How many weeks pregnant you are.
• Whether your baby is moving as usual.
• Any pregnancy conditions you have been told about, such as a low-lying placenta or a positive Group B strep result.

Until you are seen, a pad can help you judge the amount and color. Many obstetric providers advise against putting anything into the vagina because of a possible infection risk. Ask your provider whether to avoid tampons, intercourse, baths and showers after the water has broken, since advice depends on how far along you are and your health history.

How the hospital confirms it

Staff usually begin by asking about your symptoms and by examining you. A sterile speculum exam may let them see fluid pooling in the vagina. ACOG Practice Bulletin No. 217 covers how rupture of membranes is evaluated. Testing may include checking the fluid's pH with a swab, since amniotic fluid is more alkaline than normal vaginal fluid, although blood or infection can give a false result. Another test looks at a dried sample of fluid under a microscope for a fern-like pattern. An ultrasound may check how much fluid surrounds the baby. These tests are not perfect, so clinicians interpret them together with your story.

The team will also usually monitor your baby's heart rate and may check for contractions, signs of infection and your baby's position.

Why you should call right away if your water breaks

Once the membranes open, the baby is no longer fully sealed off from the vagina. Several concerns follow:

• Infection. Bacteria can travel upward into the uterus. An infection of the membranes and fluid, called chorioamnionitis, can affect both parent and baby. A longer time from rupture to delivery is associated with a higher risk of intra-amniotic infection, a relationship that ACOG Practice Bulletin No. 217 discusses, and Group B strep colonization can add to the concern. If you are Group B strep positive, tell the team. ACOG Committee Opinion No. 797 recommends intrapartum antibiotic prophylaxis for people who meet its criteria, including a positive Group B strep result, to reduce early-onset infection in the baby. If you want background on that test, see our article on the Group B strep test in pregnancy.
• Umbilical cord problems. In some situations, particularly when the baby is not head down, the cord can slip down into the vagina ahead of the baby. This is called cord prolapse and is an emergency.
• Placental separation. Placental abruption is an uncommon complication, discussed more often with preterm rupture of membranes. Bleeding with pain is a warning sign.
• Preterm birth. When the water breaks before 37 weeks, the baby may need extra care, and the plan is made around how far along you are.

If you have been told your placenta covers or sits near the cervix, any fluid or bleeding deserves an immediate call, and heavy bleeding is an emergency. Our article on placenta previa explains why.

If your water breaks at term

At full term, labor often begins on its own after the membranes rupture, but not always. If contractions do not start, your provider will discuss options. ACOG Practice Bulletin No. 217 describes induction of labor as a reasonable option at term, with expectant management and monitoring as an alternative for some patients after counseling. Your gestational age, Group B strep status and overall health all shape the plan, so you and your team decide together. Walking through the plan in advance, at a prenatal visit, can make that conversation less stressful.

Contractions that come after the water breaks are sometimes mistaken for the practice tightening of Braxton Hicks. Our article on Braxton Hicks versus real contractions can help you sort those out.

If your water breaks before 37 weeks

Preterm prelabor rupture of membranes is less common than rupture at term, but it needs prompt evaluation. Go to the hospital or labor and delivery unit as your provider directs rather than waiting at home. Care may include monitoring, antibiotics to prolong pregnancy and treat or prevent infection, corticosteroids to help the baby's lungs mature, and in some cases transfer to a hospital with neonatal care (see ACOG Practice Bulletin No. 217). What is recommended depends on your gestational age and your own circumstances, and your obstetric team will explain the plan.

What to watch for in the meantime

While you are arranging a ride or waiting to hear back, pay attention to changes. Green, brown or foul-smelling fluid, fever, a racing heartbeat, strong belly pain, or a drop in your baby's movements are reasons to call labor and delivery right now and go in as they direct, not to wait for a routine appointment. Heavy bleeding, a feeling of something in the vagina, any loop you can see or feel, or a strong urge to push should be treated as an emergency and needs 911. The lists below separate the two levels.

Many people worry they will overreact. Providers generally prefer that you call and learn it was a false alarm. Urine leaks and discharge are common in late pregnancy, and checking is reasonable.

When to Seek Medical Care